Stabilized oil slurries of carbonaceous materials

Abstract

Mixtures of an alkoxylated quaternary salt and a nitrogen base having from zero to nine carbon atoms are added to carbonaceous materials in oil slurries such as a coal oil mixture (COM) or a coke oil mixture in an amount sufficient to stabilize the slurries during storage and dispersing at various temperatures. Useful stabilizer mixtures include a mixture of from about 99% to about 75% by weight of an alkoxylated quaternary salt which is a reaction product of a cocoamine ethoxylate and diethyl sulfate and from about 1% to about 25% by weight of a nitrogen base such as urea. The stabilizer mixtures may be added to either the oil or slurry (or during grinding of the carbonaceous material) and are effective with or without addition of water. Coal/coke oil slurries may contain from about 40 to about 90 parts by weight of oil, about 10 to about 60 parts by weight of powdered coal or coke, about 0.01 to about 6.0 parts by weight of the stabilizer mixture and about 0 to about 10 parts by weight of water.

Dependencies are inferred from the claim text.